// Any类型
// let notSure: any = 666
// notSure = 'wn'
// notSure = false

// notSure.trim()


//
let value: unknown;

value = true
value = 'csc'
value = 123
value = Math.random
value = null
value = undefined

let val1: unknown = value
let val2: any = value
// unknown类型不能赋值给其他类型
// let val3: boolean = value
// let val4: number = value
// let val5: String = value

// value.trim()